Effects of Erosion Control Structures on Shoreline Evolution of the Tainan Gold Coast, Taiwan

摘要

In-site bathymetric measurements are too expensive to be sufficientlyavailable for the investigation on beach changes. We proposed a seriesof image processing to detect waterlines from 31 satellite images over12 years. A correction method is used to determine the correspondingshorelines considering tidal variations. Annual and seasonal shorelinechanges at the Tainan Gold Coast (TGC), Taiwan, were evaluated.Effect of groins at the southern TGC on beach evolution was alsostudied. The method is proven to be applicable for shoreline change.